I searched the forums for, “User Privilege Error!” and found this:
Does this resolve for you? I don’t have an XBox, so I can’t clarify the above note any for you; hopefully it makes more sense to you than it does to me.
Also, the other thing you might try if the above doesn’t work, or for some reassurance, is to run a benchmark test of the game. You do this via the game’s menus. After completing it (just takes a minute), it gives a score on how well your PC/laptop performed. Your PC/laptop needs to meet a certain threshold score in order to play online multiplayer, as I understand it. It will tell you whether or not your system met the required score.
To run this test, launch the game, then select Options > Run Benchmark Test (button in lower-right corner)